Rendering multiple separate GUI elements at once

[Roboguy99]

What I want to is render one GUI background layer which extends GuiContainer with all the slots in the correct place and no other features. I then want any progress bars, gauges, tanks, etc to be their own texture file rendered on top at the given co-ordinates. It's not working as I would like though, as you can see from this image:

 

What should be happening is a grey rectangle box in the middle of the screen somewhere (I haven't been able to fine-tune the location yet because of this bug), which is partially yellow depending on the progress values you give it (haven't coded this in properly so you have to hard-code it). No matter what co-ordinates I specify and no matter what progress I specify the result is always the same as in that image.

 

I've been trying to get this system to work with my generator block first, trying to render the inventory screen and a power bar.

 

I have quite a lot of code so here are the links to each one on my Github repo:

 

Generator GUI class: https://github.com/Roboguy99/Food-Tech/blob/master/src/main/java/roboguy99/foodTech/client/gui/GuiGeneratorBasic.java

Base GUI class: https://github.com/Roboguy99/Food-Tech/blob/master/src/main/java/roboguy99/foodTech/client/gui/GuiBase.java

Power bar class: https://github.com/Roboguy99/Food-Tech/blob/master/src/main/java/roboguy99/foodTech/client/gui/element/GuiElementPowerHorizontalLarge.java

Element base class: https://github.com/Roboguy99/Food-Tech/blob/master/src/main/java/roboguy99/foodTech/client/gui/element/GuiElement.java

 

Power bar texture: https://github.com/Roboguy99/Food-Tech/blob/master/src/main/resources/assets/roboguy99/textures/gui/elements/powerHorizontalLarge.png

Inventory screen texture: https://github.com/Roboguy99/Food-Tech/blob/master/src/main/resources/assets/roboguy99/textures/gui/blank.png

 

Sorry about the amount of links there, but I thought it would be easier than uploading all the code into spoilers. If anybody can help, that will be great. Thanks in advance.